# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 46.28   b = 19.43   c = 42

Area: T = 408.0329992473
Perimeter: p = 107.71
Semiperimeter: s = 53.855

Angle ∠ A = α = 90.01110054573° = 90°40″ = 1.57109884083 rad
Angle ∠ B = β = 24.82442196803° = 24°49'27″ = 0.43332643677 rad
Angle ∠ C = γ = 65.16547748624° = 65°9'53″ = 1.13773398777 rad

Height: ha = 17.63331025269
Height: hb = 421.9999992252
Height: hc = 19.43299996416

Median: ma = 23.13766127599
Median: mb = 43.11107640271
Median: mc = 28.61326134773

Inradius: r = 7.57664551569
Circumradius: R = 23.14400004269

Vertex coordinates: A[42; 0] B[0; 0] C[42.00437321429; 19.43299996416]
Centroid: CG[28.00112440476; 6.47766665472]
Coordinates of the circumscribed circle: U[21; 9.719903389]
Coordinates of the inscribed circle: I[34.425; 7.57664551569]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 89.98989945427° = 89°59'20″ = 1.57109884083 rad
∠ B' = β' = 155.176578032° = 155°10'33″ = 0.43332643677 rad
∠ C' = γ' = 114.8355225138° = 114°50'7″ = 1.13773398777 rad

# How did we calculate this triangle?

### 1. The triangle circumference is the sum of the lengths of its three sides ### 2. Semiperimeter of the triangle ### 3. The triangle area using Heron's formula ### 4. Calculate the heights of the triangle from its area. ### 5. Calculation of the inner angles of the triangle using a Law of Cosines    